Mix ingredients together and place in a nonstick 8-inch-square pan. Prepare crust.
Preheat oven to 425 degrees. Stir dry ingredients together. Add margarine and mix until it is crumbled. Stir in milk until the mixture forms a ball. Knead 6 times. Roll out to a thickness of 1/2 inch. Using a biscuit cutter, cut dough into 8 biscuits. Place biscuits over filling and bake about 35 minutes, until golden.
1 3/4 cups all purpose unbleached flour
1 1/2 tsp baking powder
3/4 tsp salt
2 tablespoon sugar
2 tablespoon reduced-fat margarine
2/3 cup non-fat milk